Brace for milling-machines



J. C. LAWRENCE.

BRACE FOR MILLING MACHINES. APPLICATION FILED JUNE 11 1919.

INVENTOR.

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1. c. LAWRENCE.

BRACE FOR MILLING MACHINES.

APPLICATION FILED JUNE I7, 1919.

Patented June 1, 1920.

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UNITED STATES PATEN OFFICE.

JAMES C. LAWRENCE, OF WEST ASHEVILLE, NORTH-CAROLINA.

. BRACE FOR MILLING-MACHINES.

To all whom it may concern: I

Be it known that I, JAMES C. LAWRENCE,

-a citizen of the United States, residing at West Asheville, in the county of Buncombe and State of North Carolina, have invented new and useful Improvements in Braces for Milling-Machines, of which the following is a specification.

This invention relates to improvements in braces for milling machines, in'the use of which the usual vibration and chatter incident to cutting large gears is entirely avoided.

The improved brace member comprises a;

Fig. 2 is an enlarged vertical elevation of the brace detached.

Figs. 3, 4, 5, 6, 7 and 8 are respective views in elevation, showing the slightly modified forms of the brace.

The brace proper comprises a base 1 formed with an opening 2 by which said brace may be bolted in place when desired, and an upright 3 rising from the base. Pivotally mounted in the upright 3 is an L-shaped vibrating member 4 comprising an approximately vertical rod 5 and a lateral arm 6. The terminal of the rod 5 is threaded to receive an adjusting screw 7 having a rounded head 8, and the arm 6 has a screw threaded therethrough carrying on the lower end a disk 9 between which and the base is arranged a coil spring 10.

In operation, the brace is positioned as illustrated in Fig. 1, that is, the base is arranged upon the machine and the head 8 of the adjusting screw positioned beneath the gear being cut as at 11. The upright bar is adjusted slightly ofl' center, prior to its engagement with the gear being cut, that is out of vertical alinement with the upright 3 so that the slightest tendency to vibration in the gear lever will be counteracted by the spring pressed member 4.

In Fig. 3 a base 12, upright 13, and vibrat- Specification of Letters Patent.

Patented. June 1', 1920.

Application filed June r2, 1919'. Serial No. 304,864.

ing member 14 are similar to the parts previously described, except that the lateral arm 15 thereof is terminally provided with a hook 16, to which one end of a coil spring 17 is secured. The opposite end ofthis spring is secured to a similar hook 18 arranged above the arm 15 andfcarried in a supporting upright 19 secured on the base.

In Fig. 3 the operation is as previously described though in this instance the hook 18 is mounted for adjustment in order to arrange the vibrating portion or member 06: center .as described in connection with the preferred construction.

In Fig. 4 the device comprises a base 20 from which rises an upright 21 carrying a vibrating rod 22 pivotally secured thereto. A similar upright 23 rises from the base and the vibrating rod 22 and upright 23 are provided with spring receiving members 24 between which the coil spring is adapted to be positioned. The member 24 on the upright 23 is mounted for adjustment through the screw 25, whereby the spring ,may be adjusted to give the desired 01f center position to the vibrating rod 22.

In Fig. 5 is the device shown as comprising a base mounted at 26 carrying a spring hook 27 and an upright 28. To the upright is pivoted the L-shaped vibrating rod 29 and the short arm 30 carries an adjustable spring hook 31. A spring is secured between the hooks 27 and 31 whereby the vibrating rod may be adjusted off center as is necessary in use. i

In Fig. 6 the base is shown at 32 and is provided with uprights 33 and 34. A vibrating rod 35 is pivotally mounted in the uprights 33 and said rod and the upright 34 are provided with bowed hooks .36 and 37 to receive the springs between them. The hook 37 isadjustable in the upright 34, for the purpose previously mentioned.

In Fig. 7 the device is shown as comprising a base 38, from which rises an upright 39. The upright has a lateral projection 40 from which extends a hook 41, and the vibrating rod 42 is pivotally mounted in the upper end of the upright 39. The rod 42 is provided with a lateral arm 43 having a spring hook 44 adjustably mounted thereon. The spring whereby the operating rod may be held ofl center for use is connected between the hooks 41 and 44 as will be apparent.

In Fig. 8 the device is shown as comprising a base 45 from which rises an upright 46 and in the upper end of which upright is mounted the usual vibrating rod 47. v A leaf spring 48 is secured upon the rod 49 extending through the vibrating rod 47 and bears at its free end upon the upright 46. The tension of the connected end of the leaf spring is adapted to be adjusted through a nut 50 whereby the vibrating rod may be thrown off center as is necessary in use.

It will be apparent in all forms described that the vibrating rod or the rod adapted to engage the gear is adjustable off center and held so through a mediumof a spring member which spring member resists the return of sand rod to a vertical position, and

- in such resistance tends to overcome the Having thus described the invention What is claimed is g 1. A brace for milling machines comprising a base, an upright rising therefrom, a vibrating rod pivotally mounted in the up right and having an end adjustable to an adjacent article and spring means for holding said upright rod offset from the vertical.

2. A brace for milling machines comprising a base, an upright rising therefrom, a vibrating rod pivotally mounted in the upright, an artieleengaging member adjustably mounted'in the end. of the vibrating rod, a spring and means for adjusting the tension of the spring with respect to the vibrating rod, whereby said rod may be arranged out of vertical alinement with the upright as and for the purpose described;

In testimony whereof I aflix my signature,

JAMES LAWREN on. 

